I always carry a few jolly rancher hard candies, nice little instant simple carbs when you need it and what I call no bake cookie. I don't recall the exact recipe but it's mainly instant oats peanut butter some chocolate, with a few other minor ingredients and those are money. Put em in a pan and press em down as dense as you can get them. Not as light as oatmeal but more enjoyable to eat and get some other sources of carbs and proteins in it. Another thing I've tried in them is adding quinoa, but wasn't a fan it made them too soft imo. But if you were to pack quinoa in washed and cooked once in oven at home they'd still be light and packable. Then throw in a mountain house with your boiling water they'd open up and soften and wouldn't even notice. Great way there to try to get some extra much needed complex carbs in the back country.